Re: [PATCH v2 for-rc 3/4] RDMA/vmw_pvrdma: Add UAR SRQ macros in ABI header file

[Jason Gunthorpe <jgg-uk2M96/98Pc@public.gmane.org>]

On Wed, Dec 20, 2017 at 09:50:57AM -0800, Bryan Tan wrote:
> Support for SRQs were added in the vmw_pvrdma userlevel library
> before two necessary macros were added into the kernel ABI header
> file. Add the two UAR SRQ macros that are required by the userlevel
> library so that the library can rely on the kernel ABI header file
> for these SRQ macro definitions.
> 
> Fixes: 8b10ba783c9d ("RDMA/vmw_pvrdma: Add shared receive queue support")
> Reviewed-by: Adit Ranadive <aditr-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
> Reviewed-by: Aditya Sarwade <asarwade-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
> Reviewed-by: Jorgen Hansen <jhansen-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
> Signed-off-by: Bryan Tan <bryantan-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
>  include/uapi/rdma/vmw_pvrdma-abi.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/uapi/rdma/vmw_pvrdma-abi.h b/include/uapi/rdma/vmw_pvrdma-abi.h
> index aaa352f..4007cac 100644
> +++ b/include/uapi/rdma/vmw_pvrdma-abi.h
> @@ -58,6 +58,8 @@
>  #define PVRDMA_UAR_CQ_ARM_SOL		BIT(29)		/* Arm solicited bit. */
>  #define PVRDMA_UAR_CQ_ARM		BIT(30)		/* Arm bit. */
>  #define PVRDMA_UAR_CQ_POLL		BIT(31)		/* Poll bit. */
> +#define PVRDMA_UAR_SRQ_OFFSET		8		/* SRQ doorbell. */
> +#define PVRDMA_UAR_SRQ_RECV		BIT(30)		/* Recv bit. */

Thinking about this.. These constants are not used in the kernel, so
what are they for, and why are they a 'uapi' header?

I'm guessing this is the 'PCI BAR' ABI and the kernel does't use UAR?

Jason
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